I like to get thoughts/experiences about Rohn TB3 bearings vs. Glenn Martin TB25. The antennae will be a 4 element SteppIR and an M2 6M7JHV on 20 feet of 2" chrom-moly. I plan to use 2 bearings. Can
This URL will carry you to an IPTCI bearing in the model series NANF. These bearings have 4 holes rather than two holes and have an eccentric locking collar. The price quoted here in potato country i
Thanks Tod. Looks like they only sell to dealers? Mike _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com
To get the correct bearing use the URL and then change the shaft diameter to '2S in' . http://www.iptci.com/store/product/2/15917?s=2+in&e=B I have no pecuniary interest in these bearing -- only know
The problem with the bearings you indicate is that they are not 'thrust bearings!" A thrust bearing is a particular type of rotary <http://en.wikipedia.org/wiki/Bearing_%28mechanical%29>bearing. Like
true. but I think most "ham" thrust bearings are regular old radial load ball bearings with the races parallel to the shaft. A standard bearing will take a fairly substantial axial load, and the rota
Thanks for the ideas and discussion guys. Food for thought. Can anyone address the 2 points I asked about? Rohn vs Glenn Martin bearings: http://www.texastowers.com/rohn_tb.htm http://www.glenmartin.
Remember it's a ROHN shelf in a ROHN tower with a ROHN bearing. According the ROHN the bearing is for side loads and as it's a complete ROHN system I'd stick with their recommendations. IOW the shelf
The idea that the bearing is designed to obviate lateral motion just doesn't make sense to me. I believe it's there to take the vertical load. I wonder if a PE came up with the idea the bearing was f
That used to be my understanding, but with the ROHN bearings I have to go with their instructions...(Prime directive). OTOH tapered bearings like wheel bearings are made to take lateral and axial for
The rotator has a bearing which should suffice in most installations and there are no one bearing fulcrum installations unless the rotator is mounted above the tower. If the rotator bearing is inadeq
Please watch the attributes, you quoted the the text I answered, but the header makes it look like It's an answer from me. <:-)) 73 Roger (K8RI) _______________________________________________ ______